The manufacturing of long-lasting durable goods, including airplanes and machinery, saw some of the biggest increases in job vacancies in April, in addition to the information sector.

The business-services industry saw more openings than any other industry, with 1.3 million in April. And the health care and social services industry came just behind, with 1.2 million openings combined in April.

The Labor Department categorizes people as employed if they received any paid work during the week the monthly survey was conducted, which includes part-time and temporary work.

The labor market maintained steady growth in May with 223,000 jobs added to the U.S. economy. The unemployment rate also fell to 3.8 percent, which is the lowest level since April 2000, and a drop from 3.9 percent in April, the Labor Department reported earlier this month.